Hi Guys, Since I live with roommates I'm going to need to know exactly how much my PiP will be consuming to be fair. I've been looking at these two Kill-a-Watt models: P4460 Kill A Watt EZ P4480 Kill A Watt GT I need to calculate my monthly usage, and I'd like a device that could read out the cost for the month thus far. They both look like they can do that, but the second one has a timer ability so I can schedule the charging to complete right before my commute (per these recommendations). What do you guys think? Also, if you are planning on using a Kill-a-Watt, which one?